Abstract: For increasing the safety of the new gas fire extinguishing agent in engineering application, explore its compatibility with metal materials, this paper carried out the compatibility test between new fire extinguishing agent (HFO- 1336 mzz,FK-5-1-12, HFO-1233 zd) and the gas fire extinguishing system typical metallic materials(HPb59- 1,Q235,37Mn,20#,304). According to the practical application condition of fire extinguishing system, the test process adopts soak and half-soak with normal temperature and pressure method, and soak with temperature alternating under high pressure storage method to analyze the compatibility. The compatibility parameters of the selected extinguishing agent and metal materials under different test conditions were obtained.

Key words: new gas fire extinguishing agent, metal material;temperature alternating under high pressure storage